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Card , MSM and Backplane contention.

Card , MSM and Backplane contention.

Rod_Robertson2
Contributor
I am trying to find out the contention rates between various modules in a BD8800
ie the difference between an 8 port 10 G card and a 24 port 10 Gig card ( 8900-10G24X-c ) and what dependencies on the specifics MSM's
3 REPLIES 3

Rod_Robertson2
Contributor
EtherMAN that sound logical ...

EtherMAN
Contributor III
Brandon doesn't the switch backplane down grade to lowest card type in the 8900 line... so an xl card will take on the -c card tables??

BrandonC
Extreme Employee
Hi Rod,

You can find most of this information in the BlackDiamond 8800 datasheet, in Figure 2: Connectivity Options by I/O Module and Figure 4: MSM Module Options.

Essentially, with two 8900-MSM128's, you can get up to 128 Gbps throughput on an 8810 chassis, and up to 80 Gbps on an 8806 chassis for both of these cards (8900-10G24X-c and 8900-10G8X-xl). The primary difference is that the XL module has larger table sizes, and will not be oversubscribed. The 8900-10G24X-c will be oversubscribed by a factor of 1.875 with two 8900-MSM128's in an 8806 chassis, and oversubscribed by a factor of 3 in an 8810 chassis.

-Brandon
GTM-P2G8KFN